Require manifests for native messaging hosts.

chrome/browser/extensions/api/messaging/native_process_launcher.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_PROCESS_LAUNCHER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_PROCESS_LAUNCHER_H_
 
 #include "base/process.h"
 #include "chrome/browser/extensions/api/messaging/native_message_process_host.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace extensions {
 
+class NativeMessagingHostManifest;
+
 class NativeProcessLauncher {
  public:
   // Callback that's called after the process has been launched.
   // |native_process_handle| is set to base::kNullProcessHandle in case of a
   // failure.
   typedef base::Callback<void (base::ProcessHandle native_process_handle,
                                base::PlatformFile read_file,
                                base::PlatformFile write_file)> LaunchedCallback;
 
   static scoped_ptr<NativeProcessLauncher> CreateDefault();
 
   NativeProcessLauncher() {}
   virtual ~NativeProcessLauncher() {}
 
-  // Launches native host with the specified name asynchronously. |callback| is
-  // called after the process has been started. If the launcher is destroyed
-  // before the callback is called then the call is canceled and the process is
-  // killed if it has been started already.
-  virtual void Launch(const std::string& native_host_name,
+  // Finds native messaging host with the specified name and launches it
+  // asynchronously. Also checks that the specified |origin| is permitted to
+  // access the host. |callback| is called after the process has been started.
+  // If the launcher is destroyed before the callback is called then the call is
+  // canceled and the process is killed if it has been started already.
+  virtual void Launch(const std::string& origin,
+                      const std::string& native_host_name,
                       LaunchedCallback callback) const = 0;
 
  protected:
+  // The following two methods are platform specific and are implemented in
+  // platform-specific .cc files.
+
+  // Loads manifest for the native messaging host |name|.
+  static scoped_ptr<NativeMessagingHostManifest> FindAndLoadManifest(
+      const std::string& native_host_name,
+      std::string* error_message);
+
+  // Launches native messaging process.
   static bool LaunchNativeProcess(
       const base::FilePath& path,
       base::ProcessHandle* native_process_handle,
       base::PlatformFile* read_file,
       base::PlatformFile* write_file);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NativeProcessLauncher);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_PROCESS_LAUNCHER_H_